mixing: Add mixclient package

The mixclient package implements a client for the peer-to-peer mixing process.
It depends on a mixpool to send and receive mixing messages to and from the
network.

go.mod

@@ -45,6 +45,7 @@ require (
 )
 
 require (
+	decred.org/cspp/v2 v2.2.0 // indirect
 	github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412 // indirect
 	github.com/companyzero/sntrup4591761 v0.0.0-20220309191932-9e0f3af2f07a // indirect
 	github.com/dchest/siphash v1.2.3 // indirect
@@ -53,6 +54,7 @@ require (
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
 	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
 )
 
 replace (

go.sum

@@ -65,6 +65,8 @@ golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

mixing/go.mod

@@ -9,20 +9,21 @@ require (
 	github.com/decred/dcrd/chaincfg/chainhash v1.0.4
 	github.com/decred/dcrd/chaincfg/v3 v3.2.0
 	github.com/decred/dcrd/crypto/blake256 v1.0.1
+	github.com/decred/dcrd/dcrec v1.0.1
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0
 	github.com/decred/dcrd/dcrutil/v4 v4.0.1
 	github.com/decred/dcrd/txscript/v4 v4.1.0
 	github.com/decred/dcrd/wire v1.7.0
 	github.com/decred/slog v1.2.0
 	golang.org/x/crypto v0.23.0
+	golang.org/x/sync v0.7.0
 )
 
 require (
 	github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412 // indirect
 	github.com/dchest/siphash v1.2.3 // indirect
 	github.com/decred/base58 v1.0.5 // indirect
 	github.com/decred/dcrd/crypto/ripemd160 v1.0.2 // indirect
-	github.com/decred/dcrd/dcrec v1.0.1 // indirect
 	github.com/decred/dcrd/dcrec/edwards/v2 v2.0.3 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
 	golang.org/x/sys v0.20.0 // indirect

mixing/go.sum

@@ -57,6 +57,8 @@ golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=